i have a cala lily in my garden, it looks a bit yucky! very slimy leaves, almost looks frost bitten, is it dying? will it grow back? when we moved into house june 08 the plant was in full bloom and large in size, about 2 ft across

Were the flowers white? If so, it might have been one called Zantedeschia aethiopica 'Crowborough' (sorry about the long name) which is the hardiest one. So yes, it has been frost damaged, and yes, it might well recover. Try tidying it up a bit so that snails and slugs don't get a look in and the soggy leaves don't rot, Then - it's waiting time!

They usually die back in the winter, so don't worry too much. There are a lot of tender ones in the family, which wouldn't survive outside.

yes, the cala lily is white, i have now tidied up plant, do you think putting a bucket over it would help? or perhaps some feed?( by tidying up i have cut the plant right down & taken rotten soggy leaves off)

Do not cover it with a bucket, it is likely that you will get condensation and it will rot the crown even more. Put some bark chippings around the crown and that should give it a bit of protection and keep any hard frosts from damaging it